<?php
        //验证查询方向
       if(empty( $type )){
           skip('student_select.php','glyphicon-remove-sign','查询方向不得为空');
       }

      //验证查询内容是否为空
      if(empty( $keys )){
          skip('student_select.php','glyphicon-remove-sign','请输入你要查询的内容');
      }



?>